- let something down
- lethargic
- leucoplast
- level
- liaise
- liaison
- libertinism
- libra
- lichen logy
- licit
- lick
- licker
- licking
- lie at the door of
- lie in one's teeth
- lie in state
- ligation
- light-headed
- limbo
- limited
- lindow man
- line of operations
- lionize
- liquid
- lissome
- litany
- literary language
- literate
- load
- lobby
- lobectomy
- lock someone up
- log
- logical conclusion
- logorrhea
- loiter
- lone
- long-lived
- long-standing
- look
- look after
- look back on
- lose sight of
- losing way
- lounge
- lousy
- lust
- lustful person
- lux
- luxurious
- lye
- lymphatic gland
- lyrics
- lackadaisical
- laboured
- lace into
- lachrymose
- ladder
- lady
- lair
- lapsed
- lass
- laudation
- laudatory
- laugh something off
- lean
- leaflet
- leave
- legacy
- lend a hand
- length
- leniency
- let on
- lethal
- let-up
- libation
- lexicon
- lie low
- life-and-death
- likelihood
- limitation
- line
- line up
- lay it on the line
- line someone up, line something up
- line one's pockets
- listen in
- live
- livelihood
- liven liven up
- lizard
- loaf
- loaf
- loneliness
- long-suffering
- lookout
- loop
- loophole
- lord
- lose